How to update multiple rows

[venkat <ven.tammineni@xxxxxxxxx>]

Dear All,

  I want to update multiple row in single query.I am trying for below query.I am getting error  as

 

"ERROR: more than one row returned by a subquery used as an _expression_

SQL state: 21000"

Here is my Query.

update parcelsdata set gid=(select random() * 10),

     kasarano=(select kasarano from parcelsdata),

     murabano=(select murabano from parcelsdata),

     the_geom = (select (st_dump(st_polygonize(st_union(st_boundary(the_geom), the_line)))).geom as the_geom from 

(select gid,kasarano,murabano,st_linefromtext('LINESTRING(' 

||(st_xmin(the_geom)-1)::text||'

'||(st_ymax(the_geom)-the_length)||',

'||st_xmax(the_geom)+1||'

'||st_ymax(the_geom)-the_length||')',24047) as the_line, the_geom from 

(select 100 as the_length, * from parcelsdata) a) b

where gid = 113 GROUP BY gid,kasarano,murabano)

where kasarano='1' and murabano='119'

Please let me know.I am waiting for your great response.

Thanks and Regards,

Venkat